Hi. I need to access what other applications write to the parallel port address (0x378). Newer computers do not have a physical port, so I'm building myself an USB based extension. I have the hardware and driver ready for it, all I need is to find out what other applications write at the port's address.
This way, my device will behave like a real parallel port, when you will use an application like relais timer to change some pins, the driver will read the change and send it to my hardware.
I hope I'm clear, I asked in other forums and no one seems to understand what I want so, again, I don't want to read the parallel port's inputs, I want to read what other applications output to the port. The output is located at 0x378 on most motherboards.